Cutting tool



April 12, 1927. 36

H. GOLDBLATT CUTTING 'TooL Filed Nev. 22. 1924 INVENTOR.

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I .664 ATTORNEY.

Patented Apr. 12, 1927.

UNiTED STATES HARRY GOLDIBLATT, OF KANSAS CITY, MISSOURI.

CUTTING TOOL.

Application filed November 22, 1924.

My invention relates to improvement in cutting tools.

It is particularly well adapted for use in cutting away a portion ofmaterial for marl-:ing plastered walls to resemble tiling or masonry.such as is common practice in bathrooms, kitchens and hallways.

One or the objects of my invention is to provide a novel tool of thekind described that is easily and quickly adjusted to different cuttingdepths.

A further object of my invention is to provide a novel tool of the kinddescribed which can be used in cutting uniform grooves of the same widthand depth with the one setting and in which the material cut away willbe kept clear or the finished groove.

A still further object of my invention 1s to provide a novel tool of thekind described, which is cheap to make, strong and durable. not liableto get out of order and in which a worn blade may be easily and quicklyreplaced with a new one without 2 the aid of special tools.

The novel features of my invention are hereinatter fully described andclaimed.

In the accompanying drawing, which illustrates the preferred embodimentof my invention,

Jig. 1 is a side elevation of my improved tool.

Fig. :2 is a top view of the same.

Fig. 3 is a tl ragmental view, partly broken away, showing the blade inthe operative position.

Fig. 4 is a t'ragn'iental sectional view on the line '-ll: of Fig. 3.

Fig 5 is a perspective view of one of the 40 blades.

Fig. 6 is a top view of a modified form he blade. Similar referencecharacters designate similar parts in the diii erent views. 1 and 2designate respectively two parallel members mounted at opposite sides ofa shorter middle member 3 to which they are secured in any suitablemanner, as by rivets at, so as to form a handle. The projecting forwardends of the members 1 and 2 and the adjacent end of the middle memberform a notch 5 which communicates with Serial No. 751,430.

parallel longitudinal slots 6 between the member 3 and the members 1 and2.

A U shaped blade 7 has its arms adapted to be removably and adjustablymounted in the slots 6 respectively. Said arms are respectively providedin corresponding lateral edges with two notches 8 of greater width thanthe diameter of a clamping screw 9, which is adapted to be extendedthrough the notches 8 and through holes provided there for in themembers 1, 2 and 3, the hole in the member 2 being threaded and havingthe screw 9 fitted thereto.

This construction permits of the insertion and removal of the blade 7,and of its adjustment radially in all directions or circumferentially onthe screw 9. By tighten ing the latter, the blade is securely held inthe position to which it may be adjusted. By providing the lateralnotches 8 in the arms of the blade, the latter is held from accidentalpulling out of the handle, while enabling its easy insertion or removalwithout removing the screw.

In the operation of the tool, the operator, after loosening the screw,adjusts the blade to the desired position, and then tightens the screw,thus securing the blade rigidly R0 to the handle. The tool may then beused to cut grooves, one at a time, which will be of uniform width anddepth and which will have a smooth neat appearance, the notch 5co-operating with the blade to carry the cut out material clear or thefinished groove.

The modified form of blade 10, shown in Fig. 6 is the same inconstruction, mode of operation and function as the blade 7, alreadydescribed, with the exception that W the cutting portion of the blade 10is V- shaped, while the cutting portion of the blade 7 is semi-circularin cross section.

I do not limit my invention to the structures shown and described, asmany modifications, within the scope of the appended claim may be madewithout departing from the spirit of my invention.

.Vhat I claim is:

In a device of the kind described, a handle comprising three membersdisposed side by side, a U shaped blade having its arms disposedrespectively between the middle memher and said outer members, said armshaving correspondingly disposed notches in their lateral edges, and aclamping screw extending through and. connecting said outer members bywhich they may be made to clamp said arms against theiniddle member,said screw extending through and being laterally insert-able in and ofsubstantially less diameter than said notches and removable from saidarms through said notches, the blade thereby being circnmlerentially andadjustable radially in all directions relatively to said screw.

Intestiniony whereof I have signed my name to this specification.

HENRY GOLDBLATT.

